Neoplasms, Multiple PrimaryNeoplasms, Second PrimaryCarcinoma, Squamous CellBrain NeoplasmsNeoplasms, Unknown PrimaryHead and Neck NeoplasmsMouth NeoplasmsNeoplasms, Squamous CellEsophageal NeoplasmsSkin NeoplasmsTongue NeoplasmsLaryngeal NeoplasmsImmunohistochemistryLung NeoplasmsPancreatic NeoplasmsOropharyngeal NeoplasmsNeoplasmsTumor Markers, BiologicalNeoplasm StagingCarcinoma, Basal CellUterine Cervical NeoplasmsKeratoacanthomaPrognosisNeoplasm InvasivenessNeoplasms, Cystic, Mucinous, and SerousAdenocarcinomaVulvar NeoplasmsDNA, NeoplasmPapillomavirus InfectionsPrecancerous ConditionsGene Expression Regulation, NeoplasticMouth MucosaNeoplasm ProteinsPharyngeal NeoplasmsLymphatic MetastasisCell Line, TumorTonsillar NeoplasmsPapillomaviridaeNeoplasm Recurrence, LocalGingival NeoplasmsLip NeoplasmsPenile NeoplasmsAntigens, NeoplasmHypopharyngeal NeoplasmsPalatal NeoplasmsPapillomaKeratosisKeratosis, ActinicRetrospective StudiesKidney NeoplasmsNose NeoplasmsNeoplasms, Radiation-InducedAnus NeoplasmsCarcinoma, VerrucousEye NeoplasmsCisplatinImmunoenzyme TechniquesThyroid NeoplasmsCombined Modality TherapySurvival RateKeratinsNeoplasms, ExperimentalParotid NeoplasmsNeoplasm MetastasisNeck DissectionMaxillary Neoplasms